Steam-boiler.



PATENTED- JUNE 19, 1906.

5 P. J. HIGKE Y.

STEAM BOILER. APPLIOAT ION FILED SEPT. 29,1905.-

UNITED ..-srArns PATENT oFFroE.

F-RANors HICKEY, or SACRAMENTO, cALiroitruxAssienos or ONE- HALF o JAMES M. DUNNIGAN,

or SACRAMENTO, CALIFORNIA.

STEAM BOI LER.

Specification of Letters Patent.

. Patented June 19, 1906.

Application filed September' ZQ, 1905. Serial No, 280,610.

T 00 whom, it mayconc'ern:

Beitknown'that L'FRANCIS J. III KEY, a citizen-of the United "States, residing at Sacramento, in the county of, Sacramento and State of California, have invented new and useful I'mprovements in Steam-Boilers, of which the following'is a specification.

, My invention relates to improvements in steam-boilers, and is especially adapted for boilerscf the locomotive type.

- It consists of a cylindrical extension from the rear of the ordinary boiler with aninclosing shell and a fire-box of heat-resisting material 'and'without water-legs. o

*It also comprises details of construction, which will be more fully explained byreference -to the accompanying drawings, :in which' 3 Figure 1 is a longitudinalvertica'l section of my construction. Fig. 2 is a transverse section taken through the fire-b ox.

In the ordinary construction of boilers the "flre-boxconsists of double sheets of metal {having -a great number of connecting staybolts and forming what are known as wa ter-legs. extending ldown aroundthe furnace portion of .the boiler. The cylindrical: boiler-shell connects 'withjthis fire-box por- *tion and extends forward therefrom. In} my invention I dispense with the ordinary form of fire-box, substituting therefor a shell lined with a heat-resisting material not adapted to form water-legs or contain water,

and this furnace is made of any suitable or required length for the purpose-forwhich it is to be used. Tothe rear of the ordinary boiler-shell is secured an "annular head, and

' to this head is secured a cylindrical shell eX- tending into thefire-box and having t'ubes within itcontinuous with thoseof the main boiler.

A is a boiler-shellof any usual or suitable construction. In the present case this shell is shown as cylindrical at the front, connecting with'the front combustion-chamber B in the usual manner for locomotive-boilers. The portion A of the boiler-shell is of somewhat larger diameter than the part A and is connected by the tapering section A the rear end of the main boiler-shell, and

This is an ordinary construction for such bollers.

2 is an annular head having flan es 2 and 7 2 the former flange being rivete inside of I the flange 2 forming an open circle of u smaller diameter than the main shell. Into this flange 2 is riveted a cylindrical shell 3, whichforms the rear extension of the boiler and may be of any suitable length, depending upon the'size of the furnace, which may be as much as seven feet. The rear head 4 of this cylindrical shell is perforated to receive the flues 5, thefront ends of which are secured in the front head 6 of the main boilershell. The flues thus. haveas much greater length than that of the ordinary boiler-shell as will equal the length of this cylindrical extension, and this added length will greatly increase the heating-surface available "for the production of steam.

7 is an "outer shell ofa size substantially equal to the diameter of the portion of the main boiler-[shell A? and is riveted thereto, extending rearward some distance behind the cylindrical extension 3 and it has'a head 8 with a door-opening, as at 9.v This'shell 7 i is secured to the upper part of the extension 3 by sheet-metal segments '10 and by flanges, ,7

by'which the segments are riveted to the shelland the extension.

. Thefirebox or furnace consists of shell 11,

. '12.; These brackets or anchors maybe made in any suitable manner. I have shown them made of strips of sufficiently heavy metal having a flange turned upon-one edge,.

by which they are rivetedto the shell, and the other edge split at intervals with flanges turned alternately toward opposite sides.

These alternately-bent flanges extend into the material forming the lining and serve to hold it in place, thus forming a com lete furnace-liningwithout any necessity o the usual water-1e substantially vertical in-the lower;

s. I Any suitabIe form of fuel may be used,

such as coal or oil, and if oil is used it will be injected by a suitable burner into the space beneath the shell 3, thence returning beneath the shell toward the rear, the products of combustion entering the flues 5 and passing to the front combustion-chamber B in the usual manner. That portion of the exterior shell 7 surrounding the upper part of the shell 3 and behind the furnace proper forms, with these parts, an air-space, which, inclosing the shell, prevents any radiation and loss of heat therefrom. It will be seen that by this construction when the boiler and its flues begin to be heated the expansion of all parts will be symmetrical and in the same direction and will greatly reduce the danger of leaky joints.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A steam-boiler having in combination a main boilershell, a cylindrical rearward-extending shell of smaller diameter, an annular head connecting the two shells, an exterior shell having a diameter substantially equal to the diameter of the rear end of the main shell, and secured thereto and extending over and beyond the smaller rearward-extending shell, flues extending through the main and supplemental shells, and a shell within the fire-box and inclosing the lower rear portion of the supplemental shell, said fire-box shell having a lining of non-conducting material.

2. A steam-boiler having two diameters forming main and supplemental shells, an exterior shell having a diameter substantially equal to that of the main shell and greater than that of the supplemental shell, said exterior shell extending rearward over and beyond the supplemental shell, flues extending through the main and supplemental shells, and a fire-box of non-conducting material within the exterior shell and inclosing the lower rear portion of the supplemental shell.

3. In a boiler, a main boiler-shell having a rear headformed with flanges and a central opening, a cylindrical extension riveted into the inner flange of said head and having a head at its rear end, fiues connecting said rear head of the extension and the front head of the main boiler-shell, an exterior shell having the upper segmental portion riveted to the rear of the main boiler-shell and extending behind the extension of said shell to form an inclosure therefor, segmental plates riveted to the interior of said shell and to the top of the extension, and a heat-resisting furnace located interior to the said shell.

4. In a boiler, a main shell, an extension rearward thereto of smaller diameter, an exterior shell having its front end secured to the rear end of the main shell and extending rearward over and beyond the rear end of the supplemental shell, fiues extending through the rear and front heads of the main and supplemental shells respectively, a furnace inclosed by the exterior shell, said furnace consisting of a shell inclosing and surrounding a lower portion of the boiler extension, said shell having a heat-resisting lining, and means for locking said lining to the shell.

5. In a boiler, a main shell, a supplemental shell of smaller diameter extending rearward therefrom, an exterior shell secured. to the main shell and extending over and beyond the rear end of the supplemental shell, flues connecting the rear and front heads of the main and supplemental shells, a furnace within the exterior shell and consisting of a metal shell inclosing the lower part of the boiler extension, a non-conducting lining for .said metal shell, and brackets riveted to the shell having oppositely-turned flanges proj ecting and interlocking with the lining substance.

6. In a boiler, a main shell, an extension rearward of smaller diameter, flues connecting the rear head of the extension with the front head of the boiler, a furnace consisting of a metal shell inclosing the lower portion of the boiler extension and having a heatresist ing lining as shown, an exterior shell extending from the rear of the main boiler-shell inclosing the upper part of the cylindrical extensionand the exterior of the furnace, and brackets connecting said shell with the upper part of the extension.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

[FRANCIS J. HICKEY.

Witnesses;

HENRY P. TRICOU, S. H. NOURSE. 

